ALL art images are Copyrighted by the Artist. You may not reproduce in any way or fashion. The law is explicit about the fact that all original art is the property of and copyrighted to the creator or artist, and unless the artist signs an agreement with the purchaser, he or she retains the rights of ownership for the purposes of copying, printing editions or otherwise altering or reproducing the work in question.
In other words, if you buy an original piece of art or a print, you may not photograph it and make prints, or use it as a logo, or use it in any other fashion without written permission and some form of compensation agreed upon with the artist or his agent.